<template>
  <h2>当前求和为:{{ sum }}</h2>
  <button @click="sum++">点我＋1</button>
  <h2>个人信息</h2>
  <h2>姓名:{{ name }}</h2>
  <h2>年龄:{{ age }}</h2>
  <h2>薪资:{{ job.j1.salary }}k</h2>
  <button @click="name += '~'">修改姓名</button>
  <button @click="age++">修改年龄</button>
  <button @click="job.j1.salary++">涨薪</button>
</template>

<script>
import { ref, reactive, toRefs, readonly, shallowReadonly } from 'vue'
export default {
  name: 'Demo',
  setup() {
    let sum = ref(0)
    let person = reactive({
      name: '张三',
      age: 18,
      job: {
        j1: {
          salary: 50
        }
      }
    })
    // person = readonly(person)  所有不能改变
    person = shallowReadonly(person) //只有第一层不能改变
    return {
      sum,
      ...toRefs(person)
    }
  }
}
</script>
